Your location is Tokyo, so I assume that you have no problem flying into Japan.

Your situation is not pleasant, But not as bad as that of many other pax.

To add to your worries. AF is flying an old 77W to NRT twice a week. It has the old non-flat 2x3x2 J seats.
I would ask them to move you to F on JL to HND. But I doubt that they would do it, as you are partly using miles.